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/*
* gnuplot.c - Dump objects in gnuplot 2D format
*
* Written 2011 by Werner Almesberger
* Copyright 2011 by Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <stdio.h>
#include <string.h>
#include "coord.h"
#include "inst.h"
#include "gnuplot.h"
#define ARC_STEP 0.1 /* @@@ make configurable */
static void recurse_id(FILE *file, const struct inst *inst)
{
if (inst->obj->frame->name) {
recurse_id(file, inst->outer);
fprintf(file, "/%s", inst->obj->frame->name);
}
}
static void identify(FILE *file, const struct inst *inst)
{
fprintf(file, "#%%id=");
recurse_id(file, inst);
fprintf(file, "\n");
}
static void gnuplot_line(FILE *file, const struct inst *inst)
{
double xa, ya, xb, yb;
xa = units_to_mm(inst->base.x);
ya = units_to_mm(inst->base.y);
xb = units_to_mm(inst->u.rect.end.x);
yb = units_to_mm(inst->u.rect.end.y);
identify(file, inst);
fprintf(file, "#%%r=%f\n%f %f\n%f %f\n\n",
units_to_mm(inst->u.rect.width), xa, ya, xb, yb);
}
static void gnuplot_rect(FILE *file, const struct inst *inst)
{
double xa, ya, xb, yb;
xa = units_to_mm(inst->base.x);
ya = units_to_mm(inst->base.y);
xb = units_to_mm(inst->u.rect.end.x);
yb = units_to_mm(inst->u.rect.end.y);
identify(file, inst);
fprintf(file, "#%%r=%f\n", units_to_mm(inst->u.rect.width));
fprintf(file, "%f %f\n", xa, ya);
fprintf(file, "%f %f\n", xa, yb);
fprintf(file, "%f %f\n", xb, yb);
fprintf(file, "%f %f\n", xb, ya);
fprintf(file, "%f %f\n\n", xa, ya);
}
static void gnuplot_circ(FILE *file, const struct inst *inst)
{
double cx, cy, r;
double a;
int n, i;
cx = units_to_mm(inst->base.x);
cy = units_to_mm(inst->base.y);
r = units_to_mm(inst->u.arc.r);
identify(file, inst);
fprintf(file, "#%%r=%f\n", units_to_mm(inst->u.arc.width));
n = ceil(2*r*M_PI/ARC_STEP);
if (n < 2)
n = 2;
for (i = 0; i <= n; i++) {
a = 2*M_PI/n*i;
fprintf(file, "%f %f\n", cx+r*sin(a), cy+r*cos(a));
}
fprintf(file, "\n");
}
static void gnuplot_arc(FILE *file, const struct inst *inst)
{
double cx, cy, r;
double a, tmp;
int n, i;
cx = units_to_mm(inst->base.x);
cy = units_to_mm(inst->base.y);
r = units_to_mm(inst->u.arc.r);
a = inst->u.arc.a2-inst->u.arc.a1;
while (a <= 0)
a += 360;
while (a > 360)
a =- 360;
n = ceil(2*r*M_PI/360*a/ARC_STEP);
if (n < 2)
n = 2;
for (i = 0; i <= n; i++) {
tmp = (inst->u.arc.a1+a/n*i)*M_PI/180;
fprintf(file, "%f %f\n", cx+r*cos(tmp), cy+r*sin(tmp));
}
fprintf(file, "\n");
}
static void gnuplot_inst(FILE *file, enum inst_prio prio,
const struct inst *inst)
{
switch (prio) {
case ip_pad_copper:
case ip_pad_special:
/* complain ? */
break;
case ip_hole:
/* complain ? */
break;
case ip_line:
gnuplot_line(file, inst);
break;
case ip_rect:
gnuplot_rect(file, inst);
break;
case ip_circ:
gnuplot_circ(file, inst);
break;
case ip_arc:
gnuplot_arc(file, inst);
break;
default:
/*
* Don't try to export vectors, frame references, or
* measurements.
*/
break;
}
}
static void gnuplot_package(FILE *file, const struct pkg *pkg)
{
enum inst_prio prio;
const struct inst *inst;
/*
* Package name
*/
fprintf(file, "# %s\n", pkg->name);
FOR_INST_PRIOS_UP(prio) {
for (inst = pkgs->insts[prio]; inst; inst = inst->next)
gnuplot_inst(file, prio, inst);
for (inst = pkg->insts[prio]; inst; inst = inst->next)
gnuplot_inst(file, prio, inst);
}
fprintf(file, "\n");
}
int gnuplot(FILE *file, const char *one)
{
const struct pkg *pkg;
for (pkg = pkgs; pkg; pkg = pkg->next)
if (pkg->name)
if (!one || !strcmp(pkg->name, one))
gnuplot_package(file, pkg);
fflush(file);
return !ferror(file);
}
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